refactor(chain): Replace canonical_ancestors with canonical_spends #263

Job	Run time
Rust fmt	14s
prepare	3s
Check WASM	1m 20s
Rust clippy	1m 20s
Check no_std	48s
Build & Test (1.88.0, true, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	2m 19s
Build & Test (1.88.0, true, --all-features)	3m 55s
Build & Test (1.75.0, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	2m 16s
Build & Test (1.63.0, --all-features)	7m 31s
Build & Test (1.63.0, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	8m 7s
Build & Test (1.75.0, --all-features)	4m 8s
Build & Test Examples (example_electrum)	1m 2s
Build & Test Examples (example_bitcoind_rpc_polling)	42s
Build & Test Examples (example_cli)	41s
Build & Test Examples (example_esplora)	57s
	35m 23s

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